Combined determination method for content of calcium and chlorine in solid sintering aid

A technology of sintering aid and determination method, which is applied in the field of chemical analysis and detection to achieve the effects of improving accuracy and rapidity, avoiding property changes, and improving analysis efficiency

Pending Publication Date: 2021-05-14
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention is aimed at the problems existing in the prior art, and provides a joint determination method for calcium and chlorine content in solid sintering aids. The technical scheme selects a fast and effective sampling method, and uses EDTA complexometric titration to measure the sintering aids. Calcium content in sintering aids, and chlorine content in sintering aids by automatic potentiometric titration, which mainly solves the technical problem of rapid detection of calcium and chlorine content in sintering aids for sintering production

Method used

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  • Combined determination method for content of calcium and chlorine in solid sintering aid
  • Combined determination method for content of calcium and chlorine in solid sintering aid
  • Combined determination method for content of calcium and chlorine in solid sintering aid

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Embodiment 1

[0068] Embodiment 1: see figure 1 , a joint determination method of calcium and chlorine content in a solid sintering aid, said method comprising the following steps:

[0069] Step 1: Sampling and sample preparation, use a sampler to quickly collect samples of sintering aids, and store them in airtight storage. The samples do not need to be prepared and can be directly used for determination and analysis;

[0070] Step 2: Sample weighing, use an electronic balance to quickly weigh about 1g of sample, no need for accurate weighing, just record the weighing amount directly;

[0071] Step 3: Decompose the sample, heat it with an appropriate amount of distilled water at low temperature to dissolve the sample completely, and set the volume after cooling;

[0072] Step 4: Calcium content detection, take a part of the sample solution, mask the interfering ions, use calcium carboxylic acid (calcium indicator) as the indicator in a strong alkaline medium, and titrate with ethylenediam...

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Abstract

The invention relates to a combined determination method for calcium and chlorine contents in a solid sintering aid, which comprises the following steps: 1, sampling and preparing a sample, rapidly collecting a sintering aid sample by using a sampler, and carrying out sealed storage, 2, weighing the sample, rapidly weighing about 1g of the sample by using an electronic balance, and 3, decomposing the sample, heating by a proper amount of distilled water at low temperature to completely dissolve the sample, cooling and fixing the volume; 4, performing calcium content detection and partial sample solution separation; and 5, performing chlorine determination: taking part of the sample solution, titrating the solution by using a silver nitrate standard, titrating by using a potentiometric titrator, indicating an end point through potential mutation, and carrying out blank determination at the same time; 6, calculating a result. The calcium content in the sintering aid is determined by adopting an EDTA complexometric titration method, the chlorine content in the sintering aid is determined by adopting an automatic potentiometric titration method. The technical problem of rapid detection of the content of calcium and chlorine in the existing sintering aid for sintering production is mainly solved.

Description

technical field [0001] The invention relates to a determination method, in particular to a combined determination method for calcium and chlorine content in solid sintering aids, and belongs to the technical field of chemical analysis and detection. Background technique [0002] Sintering aids are widely used in ironmaking and sintering processes. Their use can reduce sintering temperature, reduce energy consumption, and improve sinter performance. However, in the post-production of the blast furnace, the chloride ions in the sintering aid will form corrosive acidic water with water during the wet dust removal process of blast furnace ash, which will cause corrosion to the blast furnace flue dust pipeline. Therefore, it is particularly important to detect the content of the components in the sintering aid before putting it into use, and to make appropriate preparations based on the test data. [0003] At present, the acceptance of sintering aid components in the production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16G01N21/78G01N27/416
CPCG01N31/16G01N21/78G01N27/416
Inventor 贺萍陈绍林林学武王菊
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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